General Question

How do I get Halo 3 maps to play on Xbox Live?

I finally got my xbox connected to xbox live, but when I tried to get on to play Halo 3 in a multiplayer mode it gives me a message that one or more of the players in the playlist does not have the maps required to play. What does this mean and where do I get the maps?

I’m kinda in the same situation. But i downloaded all the map material off the marketplace( Cold Storage, Heroic map pack, Legendary map pack, Mythic map pack) and I’m still getting the same message when I try to go into a ranked game. I know I still don’t have Rats Nest and Foundry, where do i get these???

ok ive downloaded all the free maps, and still get the players do no have maps message… there are no options. it will let me play social slayer, but not rumble pit. i dont understand what else i can do?